#include <iostream>
#include <cstdio>
using namespace std;
int main(void) {
  int a = 10;
  int b = 20;

  int result = a + b;
  cout << "result=" << result << endl;
  result = a - b;
  cout << "result=" << result << endl;
  result = a * b;
  cout << "result=" << result << endl;
  result = a / b;
  cout << "result=" << result << endl;

  int a1 = 10;
  float b1 = 20.1f;
  float c1 =  a1+b1;
  cout << "c1=" << c1 << endl;
  printf("c1=%0.6f", c1);
  return 0;
}
